Fuse setting machine



Feb. 21, 1933. DABRASKY 1,898,081

FUSE SETTING MACHINE Filed Jan. 4, 1932 3 Sheets-Sheet l INVENTOR.

August llahr'asky A T'I'ORNE Y Feb. 21, 1933. A. DABRASKY FUSE SETTING MACHINE Filed Jan. 1932 3 Sheets-Sheet 2 INVENTOR.

Feb. 21, 1933. DABRASKY 1,898,081 7 FUSE SETTING MACHINE Filed Jan. 4, 1932 3 Sheets-Sheet 5 h h INVENTORI.

ATTORNEY I I; Augustflahra ky Patented Feb. 21, 1933 FUSE SETTING MACHINE Application filed January 4, 1932. SeriaLNo. 584,611.

(GRANTED UNDER THE ACT OF MARCH 3, 1883, AS AMENDEID APRIL 30, 1928; 370 0. Gr. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes, Without the payment to me of any royalty thereon.

This invention relates to a fuse setting machine of the type which is provided with two relatively rotatable adjusting members adapted to be coupled to a fixed and a movable part of the fuse in a round of ammunition.

The principal object of the present invention is to arrange the adjusting members so that the round of ammunition will be posi tively rotated to insure coupling with the fixed and movable parts of the fuse. In the machines heretofore employed it is possible for the round to be manually held with the result that one of the adjusting members will not be coupled to the fuse.

Further objects of the invention are to provide a novel means for locking and unlocking one of the adjusting members, and for controlling the operation of a round-holding latch.

With the foregoing and other objects in View, the invention resides in the novel arrangement and combination of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

A practical embodiment of the invention is illustrated in the accompanying drawings, wherein:

Fig. 1 is a longitudinal sectional View of the improved fuse setter with all the parts in the normal position.

' Fig. 2 is a similar view of them'achine with a round inserted.

Fig. 3 is a view in side elevation and partly in section. y f

Fig. 4 is a plan view taken on the line 44ofFig. 3. I i

Fig. 5 is a side View of the time fuse for which the machine is designed.

Fig. 6 .is a sectional view on the line 6-6 of Fig. 1. a

Fig. 7 is a sectional view on the line 7-7 of Fig. 1.

Fig. 8 is a sectional view on theline 8-8 of Fig. 2.

Referring to drawings by characters of reference:

The fuse setter comprises a housing consisting of a front portion 5 and a rear portion 6 hinged as at 7 and locked together by means of a swing bolt 8 and nut 9 carried by the part 5 and engageable with a bifurcated plate 10' on the .part 6. The front portion 5 includes a tubular guide 11 having a flared mouth to facilitate introduction of a round of ammunition 12.

Within the portions 5 and 6 of the housing are respectively mounted adjusting members 13 and 14 independently rotatable about the axis of the machine. The member 13 is adapted to be coupled to the lug 15 on a fixed part of the fuse by means of levers 16 (Fig. 7) while the member 14 is similarly coupled to the lug 17 of the rotatable time ring 18 by meansof levers 19 (Fig. 6).

The adjusting member 13 includes a bevel gear 20 meshing with a bevel gear 21 on an operating shaft 22 controlled by a handwheel 23. The adjusting member 14 includes a worm wheel 24 and bevel gear 25, the former driven from a worm 26 on an operating shaft 27 and the latter driving a bevel gear 28 (Fig. on a shaft 29. On the shaft 29 is a disk 30 having a scale 31 readable against an index 32.

Disposed axially within the adjusting member 14 is a spring-pressed plunger 33 normally held in the position shown in Fig. 1. The plunger is formed with a concave face 34 for receiving the nose of the fuse and when the round of ammunition is fully inserted the plunger is moved against the action of its spring to the position shown in Fig. 2 Where it uncovers or releases the head 35 of a latch 36. The latch is pivotally carried by the adjusting member 14 and itshead ismoved by a spring 37 to engage behind the cap 38 of the fuse and prevent removal of the round of ammunition. The rear end of the latch passes through anaperture 39 in the adjusting member 14 and terminates in an upstanding annular lug embracing the plunger 33.

The rear or outer extremity of the plunger 33 is secured to a lever 41 fulcrumed on the portion 6 of the housing. A bar 42 pivotally attached to the free end of the lever and disposed substantially parallel to the plunger 33 extends forwardly and is movable into and out of the path of rotation of a lug 43 on the periphery of a disk 44 that is provided on the inner end of the adjusting member 13. The bar 42 overlies a bolt 45 and has a lug 46 nor-' mally engaging the forward faceof the bolt and adapted to retract the bolt against-the action of the bolt spring 47. The bolt is normally in the forward position shown in Fig. 1 where it is positively engaged between lugs 48 on the disk 44 and securely locks the adjusting member 13 against rotation. A cam 49 on the disk (Fig. 8) is arranged to elevate the bar 42 against the action of a springpressed plunger 50 when the adjusting member 13'is being rotated. Thisresults in releasing the bolt which moves forwardly a short distance until arrested by one of the long teeth of a Geneva wheel 51. The Geneva wheel is rotatably mounted in the portion 6 ofthe housing and is actuated by a pin 52 carried by disk 44 (Fig. 8).

' The other long tooth of the Geneva wheel serves to hold a. plunger 53 in the retracted position when a cam 54 on the disk 44 is out of operative relation with respect .to the plunger as will be described more. fully hereinafter. The plunger 53 is normally urged towards the disk by a spring 55. The plunger is formed with a slot 56 in which is pivotally mounted a pawl 57 carrying a spring pressed plunger 58 that acts agalnst an abutment 59 to normally depress the pawl.

. An inclined finger 60 on the rear end of the pawl is arranged to be struck by an element 61 on the lever 41 to elevate the pawl.

The pawl is formed with a notch 62 adapted to receive the upper extremity of a trip lever 63'pivoted in the portion 6 of the housing and having its upper end disposed in the slot 56 of the plunger. In the normal position'shown in Fig. 1 the. pawl is in the elevated position disengaged from the trip and resting on top thereof. The trip is held against a stop64 formed by the housing6 by means of a spring pressed-plunger 65 mounted in the rear end of the plunger 53. The lower end of the trip includes a fork 66 straddling the plunger 33 and adapted to bear against the annular lug 40 of the latch 36.

In the normal position of the parts shown in'Fi'g. 1. the plunger 33 is fully forward'and covers the head35 of the latch. Thelever 41 which is attached to the plunger 3.3 is also forwardand as a result the bar 42 and bolt 45 are in engagement with the disk 44 to immobilize the adjusting member 13. The Ge neva wheel 51 has its short axis in the vertical position and the plunger 53 is held in retract-- ed position by the cam 54 on the disk 44.

hen a round of ammunition is inserted into the machine it strikes the plunger 33 and forces itto the position shown in Fig. 2. The head 35 of the 'latch being thereby uncovered, the latch 36 is rotated by the spring 37 and the head engages behind the cap of the fuse and securely holds the round of ammunition against withdrawal. The lever 41 being attached to the plunger 33 is also retracted and withdrawsthe bar 42 and the asso ciated bolt 45 from engagement with the disk 44 to efi'ec-t release of the adjusting member 13.

The adjustment of the fuse is accomplished by causing the adjusting member 13 to carry out two complete revolutions" while the mem ber 14 is either stationary or undercontinu- When the member 13 is couous operations. pled to the fixed lug -15 of the fuse by means of the levers 16 the round of ammunition will be rotated even though resistance isofiered by the man holding the round. Since the time ring 18 of the fuse is rotatable with the round, the lug 17 thereon will sooner or later snap into engagement'with the lever 19'of the adjusting member 14. When this occurs the angular displacement of the time ring will be under control of the adjusting member 14, and it will assume an angular position relative to the predetermined position of r the adjusting member 13. The purpose in turning the member 13 through two revolutions is to insure coupling of the adjusting members with the lugs 15 and 17 irrespective of their position'relative to eachother and to the adjusting members at the commencement of the operation.

During the initial movement of the adjusting member the Geneva wheel 51 is rotated to present its long axis in a vertical position and dispose the long teeth in the path of forward movement of the bolt 45 and the plunger 53. Further rotation of the member 13 brings the cam surface 49 on the disk 44 into contact with the bar 42 and elevates it out of engagement'with the bolt .45. The cam 54 on the disk has now passed the plunger 53 and both it and the bolt 45 are retained b the Geneva wheel. j

The parts remain in thisposition until the beginningjof the second revolution of the adjusting member 13, when the pin 52 will actuatethe Geneva wheel and dispose its short axis in thevertical position. The bolt 45 and plunger 53 are consequently released and 7 move forward'to ride on the face of the disk its second revolution, the cam 54 on the disk 4 p engages the plunger 53 and forces it rear-' wardly. The trip 63 being engaged by the plunger will consequently be rotated about its pivot and the fork 66 will bear against the annular lug 40 of the latch and rotate the latch to release the round of ammunition. The cam 54 may be positioned to effectactuation of the latch and release of the round at the same time that the bolt 45 reengages the disk to prevent further rotation of the adjusting member 13. Additional setting of the fuse may be accomplished by rotating the adjusting member 14: and this will be effective so long as the round has not been withdrawn.

Upon withdrawal of the round the plunger 33 is moved forwardly by its spring to cover the latch head 35 and restore the lever 41 to its forward position. The lever returns the bar 42 into engagement with the disk and the element- 61 of the lever strikes the finger 60 of the pawl and disengages the pawl from the trip 63. The machine is now in the normal position shown in Fig. 1.

I claim:

1. A fuse setting machine embodying a pair of coaxial adjusting members, a disk on one of the members, a bolt engageable with the disk, a plunger in the other adjusting member adapted to be retracted when struck by a round introduced into the machine, a latch normally covered by the plunger and adapted to hold the round, a lever actuated by the plunger, a bar attached to the lever and movable into and out of engagement with the disk, a lug on the bar for retracting the bolt, means on the disk for moving the bar out of engagement with the bolt, a Geneva wheel operable during the first revolution of the disk to restrain the bolt and operable after commencement of the second revolution of the disk to release the bolt, a plunger normally urged towards the disk, a. pawl on the plunger, a trip lever having one end engageable by the pawl and the other end adapted to actuate the latch, means on the disk for retracting the plunger into position to be temporarily held by the Geneva wheel, and means on the lever for disengaging the pawl from the trip lever.

2. A fuse setting machine embodying a pair of coaxial adjusting members, a plunger in one of the adjusting members adapted to be retracted when struck by a round introduced into the machine, a latch adapted to hold the round, a lever actuated by the plunger, bolt for holding the other adjusting member against rotation, said bolt disengaged from said member by the lever, means on the adjusting member for moving the lever out of engagement with the bolt, means for holding the bolt disengaged and operable after commencement of the second revolution of the adjusting member to release the bolt, and means under control of said other adjusting member for depressing the latch.

3. A fuse setting machine embodying a fuse and a round adjusting member, a plunger in the fuse adjusting member adapted to be retracted when struck by a round'introduced into the machine, a latch adapted to hold the round, means for holding theround adjusting member against rotation, said means disengaged from said member upon retraction of the plunger and automatically reengaged therewith upon completion of two revolutions of said member, and means under control of said. round adjusting memher for depressing the latch.

4. A fuse setting machineembodying a pair of rotatable adjusting members, a disk on one of the members, a bolt engageable with the disk, a plunger in the other adjusting member adapted to be retracted when struck by a round introduced into the machine, a lever actuated by the plunger, a bar attached to the lever and movable into and out of engagement with the disk, a lug on the bar'for retracting the bolt, means'on the disk for moving the bar out of engagement with the belt, a Geneva wheel operable during the first revolution of the disk to restrain the bolt and operable after commencement of the second revolution of the disk to release the bolt.

5. A fuse setting machine embodying rotatable fuse and round adjusting members, a plunger in the fuse adjusting member adapted to be retracted when struck by a round of ammunition introduced into the machine, a lever actuated by the plunger, means for holding the round adjusting member against rotation, said means disengaged from said member by the lever and automatically reengaging the member upon completion of two revolutions.

6. A fuse setting machine embodying a rotatable round adjusting member including a disk means for rotating the member to rotate a round of ammunition, a bolt engagc able with the disk to hold the member against rotation, a lever actuated upon insertion of round of ammunition to disengage the bolt, means for holding bolt disengaged, said means rendered inoperative through movement of the round adjusting member.

7. A fuse setting machine embodying a pair of rotatable adjusting members, a plunger in one of the adjusting members adapted to be retracted when struck by a round of ammunition introduced into the machine, a latch normally covered by the plunger and adapted to hold the round, a second plunger normally urged towards the other adjusting member, a cam on said other adjusting member for retracting the second plunger, means operable during the first revolution of said adjusting member to hold the plunger retracted, a pawl on the plunger, a trip lever having one end engageable by the pawl and the other end adapted to actuate the latch, and means associated with the round actuated plunger for disengaging the pawl from the trip lever.

8. A fuse setting machine embodying a rotatable adjusting member, a latch for holding a round of ammunition in said member, a plunger normally urged towards said mem ber, a cam on the member for retracting the j plunger, means operable during the first revolution of said member to hold the plunger retracted, a pawl on the plunger, a trip lever havin one end engageable by the pawl and the ot er end adapted to actuate the latch, V and means operable on withdrawal of the round for disengaging the pawl from the trip lever.

9. A fuse set-ting machine embodying a rotatable round adjusting member means for V I rotating the member to rotate a round of ammunition, a latch for'holding the round of ammunition in said member, means under control of the adjusting member for depressing the latch, and means operable on withdraWal of the round for inoperating. said '2 preceding means.

10. A/fuse setting machine embodying'a rotatable round adjusting member means for rotating'the member to rotate a round of ammunition, a latch for holding the round of ammunition in said member, and means operable upon rotation of the adjusting member for depressing the latch.

I 11. A fuse setter embodying a pair of rotatable adjusting members, means on one member for coupling it to a fixed element on a round of ammunition, means on the other member for coupling it to a movable element of a fuse, and means for rotating the member coupled to the fixed element through two 7' 4b revolutions in setting the fuse.

AUGUST DABRASKY. 

